HIGHlarious funnyman and Robot Chicken creator Seth Green showed up to the How I Met Your Mother set recently for his guest stint on the CBS sitcom, and his old Buffy The Vampire Slayer costar Alyson Hannigan was SOUPED!

So souped in fact, that she tweeted the above picture and posted:

I’m in the makeup chair again and next to me is @sethgreen !!!!!!!!!!YAY!!!!Reunited and it feels so good!!!!

While ti might eb possible to see other "Buffy" alum on the show, it si highly unlikely Sarah will ever appear. Though they started out friends, by the end of the shows run, word is Alyson could not stand Sarah and her adopted diva ways.